diff --git a/nrf5/boards/microbit/mpconfigboard.h b/nrf5/boards/microbit/mpconfigboard.h
index f5bfdba88a..3c226a5b76 100644
--- a/nrf5/boards/microbit/mpconfigboard.h
+++ b/nrf5/boards/microbit/mpconfigboard.h
@@ -30,6 +30,7 @@
 #define MICROPY_HW_MCU_NAME         "NRF51822"
 #define MICROPY_PY_SYS_PLATFORM     "nrf51"
 
+#define MICROPY_PY_MACHINE_SOFT_PWM (0)
 #define MICROPY_PY_MACHINE_HW_SPI   (1)
 #define MICROPY_PY_MACHINE_TIMER    (1)
 #define MICROPY_PY_MACHINE_RTC      (1)
@@ -68,4 +69,7 @@
 #define MICROPY_HW_SPI0_MOSI        (pin_A15)
 #define MICROPY_HW_SPI0_MISO        (pin_A14)
 
+// micro:bit music pin
+#define MICROPY_HW_MUSIC_PIN        (pin_A3)
+
 #define HELP_TEXT_BOARD_LED         "1,2,3,4"